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Basics of Astronomy

Basics of Astronomy. Casey McNamara. THE UNIVERSE. EVERYTHING. Galaxies, solar systems, planets, stars, black holes, clusters, dark matter, AGN. Galaxies. Large-scale system of stars, interstellar gas, dust, and plasma Elliptical Spirals Irregulars 90% composed of dark matter.

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Basics of Astronomy

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  1. Basics of Astronomy Casey McNamara

  2. THE UNIVERSE • EVERYTHING • Galaxies, solar systems, planets, stars, black holes, clusters, dark matter, AGN

  3. Galaxies • Large-scale system of stars, interstellar gas, dust, and plasma • Elliptical • Spirals • Irregulars • 90% composed of dark matter

  4. Galaxies 2

  5. Variable Stars • Cepheid • Mira • Long Period • Change luminosity • Over 5,000 catalogued A variable star in the Large Megellanic Cloud

  6. Stellar Evolution • Lifetime 2 million to trillions of years • Begins with collapse of giant molecular cloud • New stars main sequence in HR Diagram • HR Diagram shows spectral type

  7. H-R Diagram

  8. Spectroscopy • O, B, A, F, G, K, and M • Break up ray of light into components in visible light spectrum • Chemical composition of object

  9. Visible Light Spectrum

  10. Stellar Spectra and Graph

  11. Absorption and Emission Spectra

  12. Jacoby Atlas

  13. MONET North & South • MOnitoring NEtwork of Telescopes • Sutherland, South Africa • McDonald Observatory, Texas • Students receive 85% of time • Robotic • Designed to cover entire night sky

  14. Views of MONET SAAO Sutherland hilltop view, including MONET MONET Telescope and McDonald Observatory

  15. CCD and DSLR • Charged-coupled device • Found in CCD and DSLR • Digital Single Lens Reflex

  16. Astroimaging Tools • Aperture Photometry Tool • Image J • Maxim DL • Photoshop

  17. Dark and Flat Fields Dark Field Flat Field Signal to Noise • Ratio of signal power to noise corruption

  18. Astronomy Today • David Lefreniere Spectroscopy and hidden exoplanets • Nicholas Cowan Looks at wavelengths to find water on other planets

  19. Bibliography Brinkworth, Carolyn, and Claire Thomas. "Galaxies." Faulkes Telescope Educational Guide. July 2001. 2 June 2009. "Galaxies - KidsAstronomy." Astronomy For Kids. 02 June 2009 <http://www.kidsastronomy.com/galaxys.htm>. Xantox. "M104 Galaxy in Infrared Light." Strange Paths :: Physics, computation, philosophy. 02 June 2009 <http://strangepaths.com/page/3/en/>. Sanders, Robert. "Rethinking Last Century's Closest, Brightest Supernova." UC Berkeley News. 9 Jan. 2007. UC Berkeley. 2 June 2009 <berkeley.edu/.../releases/2007/01/09_LBV.shtml>. "Chapq5!" The University of Toledo : Welcome to the Department of Physics and Astronomy. 02 June 2009 <http://astro1.panet.utoledo.edu/~ljc/chapq5.html>. Smith, Gene. "Stellar Spectra." Center for Astrophysics & Space Sciences, UCSD. University of California. 02 June 2009 <http://cass.ucsd.edu/public/tutorial/Stars.html>. "Measuring Stellar Spectra." University of Colick Astronomy. 2 June 2009 <www.ucolick.org/.../week2/stellar_tempsC.html>. "Stars' Life Cycle." Think Quest Astronomy. 2 June 2009 <library.thinkquest.org/.../stars/life_cycle1.htm>. Rasband, Wayne. "MONET : ImageJ." Institut für Astrophysik Göttingen. 28 Oct. 2004. 03 June 2009 <http://www.uni-sw.gwdg.de/~hessman/MONET/ImageJ/>.

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